Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 17-08-2007, 07:33   #1
Registered User

Join Date: Feb 2005
Location: Wakefield Rhode Island
Posts: 266
Images: 25
Hot water is TOO hot.

I have a question,

I have a perkins 4-108 which is running great and at the correct temperature. We have Raritan hot water tank which also works great. The problem is that our hot water is really too hot and I would like a simple way to install a thermostat in the heating line from the engine to keep the water temp at around 120 to 140 max. Has anyone done this? If so what thermostat should I use?

Thanks.
__________________

By Invitation is offline   Reply With Quote
Old 17-08-2007, 08:45   #2
Sponsoring Vendor

Community Sponsor
Cruisers Forum Supporter

Join Date: Apr 2006
Location: Vancouver Island, BC Canada
Boat: Uniflite 31, 1973
Posts: 174
Images: 1
Never heard of it done; Put a valve off the engine port on the return side and reduce the flow or close it when not in use. It is true that normal engine temp is way (about 40 deg F) over normal domestic hot water temp. Such a thermostat would have to be integrated into the water heater design.
__________________
Experience develops good judgment; bad judgement develops experience.
EngNate is offline   Reply With Quote
Old 17-08-2007, 10:09   #3
Registered User
 
Auspicious's Avatar

Join Date: Jun 2003
Location: Chesapeake Bay
Boat: HR 40
Posts: 1,975
Send a message via Skype™ to Auspicious
Some boats have a thermostatic mixing valve on the output of the water heater to mix in some cold water and temper the output temperature. This serves to "stretch" your hot water supply and reduce the risk of burns from water that is too hot at the faucet. I expect that the mixing valves are available somewhere ...
__________________
S/V Auspicious
AuspiciousWorks
Beware cut and paste sailors
Auspicious is offline   Reply With Quote
Old 17-08-2007, 10:38   #4
Senior Cruiser

Cruisers Forum Supporter

Join Date: Jul 2006
Location: Chesapeake Region and Maine
Boat: 42' Bob Perry sloop
Posts: 4,047
Images: 4
They sure are. Lots of models. Here's one that looks like it might be appropriate for a boat: Watts Series MMV-US M1 Thermostatic Mixing Valve 1/2" (0206000) - PlumberSurplus.com

Bill
btrayfors is offline   Reply With Quote
Old 17-08-2007, 16:38   #5
Registered User

Join Date: Jun 2005
Posts: 1,901
Scott,
Force 10 does this standard on the newer units. look at what they do and buy the parts or copy it.
never monday is offline   Reply With Quote
Old 17-08-2007, 18:14   #6
Building a Bateau TW28
 
knottybuoyz's Avatar

Cruisers Forum Supporter

Join Date: Nov 2005
Location: Iroquois, Ontario
Boat: Bateau TW28 Long Cabin
Posts: 3,585
Images: 87
Quote:
Originally Posted by never monday
Scott,
Force 10 does this standard on the newer units. look at what they do and buy the parts or copy it.
We just put in a new Seward 6 gal this spring. I think I read in the phamplet that it's a USCG or ABYC req't to have the mixing valve (tempering valve) installed. I'll dig out the instructions tomorrow for a reference.
__________________
Yours Aye! Rick
~^~^~^^~^~^~^~^~^~^~^~~^~^~~^~^~^^~~^~^
"It's not the boat "you built" until you've sworn at it, bled on it, sweated over it, cried beside it and then threatened to haul the POS outside and burn it!"
knottybuoyz is offline   Reply With Quote
Old 17-08-2007, 18:23   #7
Marine Service Provider
 
AnchorageGuy's Avatar

Join Date: Mar 2003
Location: Wherever the boat is!
Boat: Marine Trader 34DC
Posts: 4,619
OK< There is no such thing as ABYC required. ABYC is a set of standards written as a guide and not to be confused with any type of requirements or as standards for the Coast Guard. Certain equipment can be made to AYBC standards but if it is not that does not necessarily mean you can't or shouldn't use it. Most older vessels were not built to AYBC standards but they are still safe and seaworthy.


ABYC – American Boat & Yacht Council – is a not-for-profit membership organization that has been developing and updating the safety standards for boat building and repair for over 50 years. ABYC is actively involved with the International Organization for Standardization (ISO) and is a leader in education for the marine industry, as well as certification programs for marine technicians.
__________________
Chesapeake Bay, ICW Hampton Roads To Key West, The Gulf Coast, The Bahamas

The Trawler Beach House
Voyages Of Sea Trek
AnchorageGuy is offline   Reply With Quote
Old 17-08-2007, 18:48   #8
Building a Bateau TW28
 
knottybuoyz's Avatar

Cruisers Forum Supporter

Join Date: Nov 2005
Location: Iroquois, Ontario
Boat: Bateau TW28 Long Cabin
Posts: 3,585
Images: 87
Quote:
Originally Posted by Chuck Baier
ABYC is a set of standards
Yup. Got a set sittin' not 3 feet from me right now. Just too damn tired to look at them right now. I was only thinking I had read it somewhere wasn't sure exactly where though. I'll do the research tomorrow.
__________________
Yours Aye! Rick
~^~^~^^~^~^~^~^~^~^~^~~^~^~~^~^~^^~~^~^
"It's not the boat "you built" until you've sworn at it, bled on it, sweated over it, cried beside it and then threatened to haul the POS outside and burn it!"
knottybuoyz is offline   Reply With Quote
Old 18-08-2007, 02:39   #9
Senior Cruiser
 
GordMay's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 34,256
Images: 240
About Tempering Water Valves:
http://www.watts.com/pdf/PG-MXV.pdf

Installation Instructions:
http://www.watts.com/pdf/1915906.pdf
&
http://www.watts.com/pdf/1915905.pdf

“Fail-safe”
in case of hot or cold water failure, most thermostatic tempering valves fail to “off”.
“Bypass”
Some valves have a built-in cold water bypass - in case of hot water failure the valve fails to “cold”.
Attached Thumbnails
Click image for larger version

Name:	AnimationLabels.jpg
Views:	159
Size:	25.0 KB
ID:	1689  
Attached Images
 
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is online now   Reply With Quote
Old 18-08-2007, 05:03   #10
Building a Bateau TW28
 
knottybuoyz's Avatar

Cruisers Forum Supporter

Join Date: Nov 2005
Location: Iroquois, Ontario
Boat: Bateau TW28 Long Cabin
Posts: 3,585
Images: 87
Temperature Control Valve (TCV)

A Temperature Control Valve on a Force 10 h/w heater. The TCV on the Force 10's acts a little differently than a mixing valve. It restricts flow of engine coolant through the heat exchanger loop as coolant temperature rises. Factory preset to 140 degs F. It does this to protect the h/w heater from excessive temps from an incorrectly thermostated engine or one that has overheating problems.

I found a reference in the documention to ABYC standard 23.7.4.2 but that wasn't specifically to do with the TCV but the Pressure Release Valve (PRV) and the req't for an overflow hose to be installed on the PRV. I knew I saw some sort of standard reference in the documentation. All ABYC says about temperature relief and h/w heaters is that the maximum relief shall be set at no more than 210 degs F. Section 23.8.12.1.2
Attached Thumbnails
Click image for larger version

Name:	waterheater.jpg
Views:	182
Size:	80.3 KB
ID:	1690  
__________________
Yours Aye! Rick
~^~^~^^~^~^~^~^~^~^~^~~^~^~~^~^~^^~~^~^
"It's not the boat "you built" until you've sworn at it, bled on it, sweated over it, cried beside it and then threatened to haul the POS outside and burn it!"
knottybuoyz is offline   Reply With Quote
Old 18-08-2007, 06:02   #11
Registered User

Join Date: May 2007
Location: Delaware, Chesapeake bay
Boat: 1985 Gozzard Pilothouse 36
Posts: 20
We Had the same set up, except the engine was a Westerbeke, with the same result. I recommend using a "single Lever" faucet, allowing you to mix in cold water as required. The metal casing rusted out on our Raritan, and has since been replaced with an Isotemp, which has mixing built in.
__________________

Boko~maru is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Perkin 4-108 hot water heater connections RETTSIE Construction, Maintenance & Refit 1 05-07-2007 06:04
Hot Water Cylinders Spirit28 Plumbing Systems and Fixtures 4 29-04-2007 04:08
Water Heater experience sought skipgundlach Product or Service Reviews & Evaluations 7 26-04-2007 05:13
hot water heaters mike d. Plumbing Systems and Fixtures 24 08-10-2006 19:16
hot water wingkeel Provisioning: Food & Drink 0 23-06-2003 08:54



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 03:32.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.